def peak(numbers):
    peaks = []
    for i in range(1, len(numbers) - 1):
        if numbers[i - 1] < numbers[i] and numbers[i + 1] < numbers[i]:
            peaks.append(numbers[i])
        
        for i in peaks:
            curr_greatest = 0
            if i > curr_greatest:
                curr_greatest = i
            
    return peaks

print(peak([1, 2, 3, 3, 4, 0, 10, 6, 5, -1, -3, 2, 3]))